The new BMW Z4 has been officially teased for the first time, with a single, shadowy image of the new sports car, plus a promised unveiling next month. The new Audi TT and Mercedes SLC rival will make its debut on 17 August. While that rules out a Frankfurt Motor Show reveal, it matches up nicely with the 2017 edition of the Pebble Beach Concours d’Elegance and Monterey Car Week. Best convertible cars to buy now With BMW choosing Pebble Beach to debut the Z4, it’s likely that we’ll see the car in concept form rather than the finished product – full debuts are few and far between at the Monterey Car Week, though concept vehicles, one-offs and special edition cars often break cover. Therefore, we could see BMW unfurl the new Z4 in a similar manner to the all-new 8 Series, with a revealing concept vehicle to whet the appetite for the production model.Our exclusive images show how the new two-seat roadster could look when it arrives. It has already been spotted testing on multiple occasions, with the most recent spyshots showing it winter testing with a slightly more revealing disguise compared to earlier mules lapping the Nurburgring. The...